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Enriquez-Maldonado IG, Montes-Galindo DA, Ortiz-Lopez R, Ojeda-Ibarra J, Martinez-Fierro ML, Rodriguez-Sanchez IP, Rojas-Martinez A, Zavala-Pompa A, Sanchez-Ramirez CA, Hernandez-Rangel AE, Sanchez-Meza K, Garza-Veloz I, Rodriguez-Hernandez A, Delgado-Enciso I. Association of Methylenetetrahydrofolate Reductase ( MTHFR) Polymorphism with Osteosarcoma in a Mexican Population. Pediatr Rep 2024; 16:786-793. [PMID: 39311329 PMCID: PMC11417709 DOI: 10.3390/pediatric16030066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2024] [Revised: 08/28/2024] [Accepted: 09/05/2024] [Indexed: 09/26/2024] Open
Abstract
The methylenetetrahydrofolate reductase (MTHFR) gene 677C➔T polymorphism is capable of altering folate metabolism and can modify certain neoplasia risk. Reports have suggested that folate can have an influence on bone development and so it is of interest to know if the MTHFR 677C➔T polymorphism is associated with the malignant transformation process of this tissue. The polymorphism was determined in 55 patients with osteosarcoma and in 180 healthy individuals. Compared with C/T+C/C genotypes, a 3.7-fold reduction in osteosarcoma probability is possible with the T/T genotype (OR 0.27, CI 95% 0.07-0.82). Undoubtedly, further studies, utilizing large samples and carried out on different populations, are necessary to confirm these results.
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Affiliation(s)
- Irma G. Enriquez-Maldonado
- State Cancerology Institute of Colima, Health Services of the Mexican Social Security Institute for Welfare (IMSS-BIENESTAR), Colima 28085, Mexico;
| | | | - Rocio Ortiz-Lopez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey 64710, Mexico (A.R.-M.)
| | - Jesus Ojeda-Ibarra
- Department of Pathological Anatomy at Monterrey Specialty Hospital No. 25 (IMSS), Monterrey 64460, Mexico
| | - Margarita L. Martinez-Fierro
- Academic Unit of Human Medicine and Health Sciences, Autonomous University of Zacatecas, Zacatecas 98160, Mexico; (M.L.M.-F.); (I.G.-V.)
| | - Iram P. Rodriguez-Sanchez
- Molecular and Structural Physiology Laboratory, School of Biological Sciences, Autonomous University of Nuevo Leon, San Nicolás de los Garza 66455, Mexico
| | - Augusto Rojas-Martinez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey 64710, Mexico (A.R.-M.)
| | - Angel Zavala-Pompa
- Department of Pathological Anatomy at Monterrey Specialty Hospital No. 25 (IMSS), Monterrey 64460, Mexico
| | | | | | | | - Idalia Garza-Veloz
- Academic Unit of Human Medicine and Health Sciences, Autonomous University of Zacatecas, Zacatecas 98160, Mexico; (M.L.M.-F.); (I.G.-V.)
| | | | - Ivan Delgado-Enciso
- State Cancerology Institute of Colima, Health Services of the Mexican Social Security Institute for Welfare (IMSS-BIENESTAR), Colima 28085, Mexico;
- School of Medicine, University of Colima, Colima 28040, Mexico (A.R.-H.)
- Robert Stempel College of Public Health and Social Work, Florida International University, Miami, FL 33199, USA
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Sherief LM, Zakaria M, Soliman BK, Kamal NM, Alharthi SA, Abosabie SAS, Abdelazeem M. Cerebral sinuses thrombosis prior to the diagnosis of acute lymphoblastic leukemia in a child: A case report. SAGE Open Med Case Rep 2022; 10:2050313X221117337. [PMID: 35991951 PMCID: PMC9382063 DOI: 10.1177/2050313x221117337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 07/15/2022] [Indexed: 11/16/2022] Open
Abstract
Acute lymphoblastic leukemia is the most common malignancy in children. In children,
venous thromboembolism is relatively common. In most cases, venous thromboembolism
manifests in patients who are diagnosed with acute lymphoblastic leukemia. Several risk
factors associated with acute lymphoblastic leukemia predispose patients to the
development of venous thromboembolism. Unlike most reported cases of venous
thromboembolism, herein we report a child who developed cerebral venous sinus thrombosis
prior to the diagnosis of acute lymphoblastic leukemia. The patient recovered from an
attack of acute gastroenteritis with sepsis, pancytopenia, and disseminated intravascular
coagulation 2 weeks before the development of thrombosis. Her laboratory workup for
coagulopathy and disseminated intravascular coagulation was normal at the time of
diagnosis of cerebral sinus thrombosis. The genetic workup for thrombophilia risk
identified several genetic thrombophilia mutations: the homozygous factor XIII V34L and
MTHFR A1298C mutations and heterozygous factor V Leiden mutation. Three weeks later, the
patient was diagnosed with acute lymphoblastic leukemia. However, it remains questionable
whether the thrombotic event was caused by the previous infection of gastroenteritis,
sepsis, and disseminated intravascular coagulation picture (which was augmented by her
genetic thrombophilia risk), or was it caused by acute lymphoblastic leukemia (that was
not detected at early stages with its associated hypercoagulable state), or was it caused
by a type of paraneoplastic syndrome. A multifactorial etiology is proposed.
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Affiliation(s)
- Laila M Sherief
- Pediatric Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Marwa Zakaria
- Pediatric Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Basma K Soliman
- Radiodiagnosis Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Naglaa M Kamal
- Kasralainy Faculty of Medicine, Cairo University, Giza, Egypt
| | - Sultan A Alharthi
- Pediatric Department, Alhada Armed Forces Hospital, Taif, Saudi Arabia
| | - Sara AS Abosabie
- Faculty of Medicine, Charité—Universitätsmedizin Berlin, Berlin, Germany
| | - Mahmoud Abdelazeem
- Pediatric Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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Lack of Impact of the A1298C MTHFR on the Risk of Childhood Acute Lymphoblastic Leukemia: Evidence from a Meta-analysis. Indian J Hematol Blood Transfus 2021; 38:255-263. [PMID: 35496972 PMCID: PMC9001782 DOI: 10.1007/s12288-021-01453-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 05/15/2021] [Indexed: 10/21/2022] Open
Abstract
To clarify the effect of the A1298C variant of methylenetetrahydrofolate reductase (MTHFR) gene on the risk of acute lymphoblastic leukemia (ALL), an updated meta-analysis was performed. Electronic literature search was carried out in PubMed to collect relevant articles. Pooled odds ratios (OR) and stratification analysis were achieved under different genetic comparison models, age and ethnicity. A total of 46 articles including 7020 cases and 12,114 controls were enrolled. Overall, no significant association was observed for the MTHFR A1298C variant on the risk of ALL in any genetic model test, when all the studies pooled together (OR ~ 1 0.91; p > 0.05). In subgroup analyses stratified by age and ethnicity, the MTHFR A1298C reduce the risk of ALL in adult under allele contrast (OR = 0.88; [0.72; 1.09], p = 0.23) mainly in Caucasian populations. The present meta-analysis provides evidence that the A1298C variant of MTHFR gene is unlikely to be a major risk gene for childhood ALL.
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Frikha R, Elloumi M, Rebai T, Kamoun H. MTHFR 677T-1298C haplotype in acute lymphoblastic leukemia: Impact on methotrexate therapy. J Oncol Pharm Pract 2021:10781552211017193. [PMID: 34000920 DOI: 10.1177/10781552211017193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Functional variants of the Methylenetetrahydrofolate reductase (MTHFR) gene, the C677T and A1298C, have largely investigated in pharmacogenomics of Methotrexate (MTX) in acute lymphoblastic leukemia (ALL), yet the conclusions are inconsistent. In addition; most of these studies do not analyze haplotypes. Here, we investigate the MTHFR 677/1298 genotypes and the 677-1298 haplotype and characterize the MTX response in Northern African ALL patients. METHODS Genomic DNA was extracted from whole venous from a total of 28 patients with ALL. Genotyping were carried out with restriction fragment length polymorphism (RFLP). A toxicity score (TS) is calculated for each patient and correlate to the haplotype. RESULTS The allelic frequency of MTHFR 677T-1298C haplotype was 10.7% in ALL patients. According to the toxicity's score (TS) there was no significant differences between haplotype groups (p = 0.79): TS was higher with wild type of MTHFR (TS = 3.43; SEM ± 0.85) followed by combined genotype (677T-1298C) (TS = 2.67; SEM ± 0.88) and isolated variant (C677T or A1298C) (TS = 2.64; SEM ± 0.92). CONCLUSION Despite the limitation of this study; our results suggest that the MTHFR 677T-1298C haplotype is common in ALL and may be a promising HD-MTX chemotherapy-related adverse effects biomarker.
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Affiliation(s)
- Rim Frikha
- Medical Genetic Department, Hedi Chaker Hospital and Faculty of Medicine of Sfax, University of Sfax, Tunisia
| | - Moez Elloumi
- Hematology Department, Hedi Chaker Hospital and Faculty of Medicine of Sfax, University of Sfax, Tunisia
| | - Tarek Rebai
- Laboratory of Histology, Faculty of Medicine of Sfax, University of Sfax, Tunisia
| | - Hassen Kamoun
- Medical Genetic Department, Hedi Chaker Hospital and Faculty of Medicine of Sfax, University of Sfax, Tunisia
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Frikha R, Jemaa MB, Frikha F, Turki I, Elloumi M, Keskes L, Kamoun H, Rebai T. Involvement of C677T MTHFR variant but not A1298C in methotrexate-induced toxicity in acute lymphoblastic leukemia. J Oncol Pharm Pract 2020; 27:1382-1387. [PMID: 32865163 DOI: 10.1177/1078155220951898] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Methotrexate (MTX) is a key drug in acute lymphoblastic leukemia (ALL) treatment; it inhibits DNA replication by blocking the conversion of 5, 10 Methylenetetrahydrofolate to 5-methylene tetrahydrofolate by methylenetetrahydrofolate reductase (MTHFR). Variants of the Methylenetetrahydrofolate reductase (MTHFR) and MTX related toxicities were largely investigated in several populations, nevertheless, the results are conflicting. OBJECTIVE This study aimed to assess the prevalence of MTHFR SNVs: C677>T and A1298>C in Tunisian patients with ALL and the relation to the frequency of drug-induced complications. METHODS 28 ALL patients were included in the study. They were treated according to EORTOC, in which a high dose of MTX (HDMTX) was prescribed. A toxicity score (ST) is calculated for each patient, summing the grades of toxicities. Genotyping of MTHFR variants was done with a PCR-based restriction fragment length polymorphism assay. RESULTS The toxicity's score (TS) was higher with C677T variant compared to wild genotype (C677C) (TS = 4; IC95% [-2.65-13.32] versus TS = 2.5; IC95% [1.65-4.55], respectively; p = 0.2); but lower with the A1298C mutation compared to those with the wild genotype (A1298A) (TS = 2.5; IC95% [0.48-4.77], versus TS =3; IC95% [1.9-5.69], p = 0.4). HDMTX-related toxicity is associated with the 677CT genotype in ALL patients (RR = 1.41, p = 0.2); not for the A1298C [OR = 0.46, [0.08-2.61], p = 0.18]. CONCLUSION Our preliminary findings highlight the impact of the C677T variant of MTHFR, but not the A1289C; in HD-MTX chemotherapy-related adverse effects in younger Tunisian ALL.
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Affiliation(s)
- Rim Frikha
- Laboratory of Histology, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
- Department of Medical Genetics, Hedi Chaker Hospital, University of Sfax, Sfax, Tunisia
| | - Maha Ben Jemaa
- Laboratory of Histology, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
| | - Fakher Frikha
- Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia
| | - Ines Turki
- Department of Haematology, Hedi Chaker Hospital, University of Sfax, Sfax, Tunisia
| | - Moez Elloumi
- Department of Haematology, Hedi Chaker Hospital, University of Sfax, Sfax, Tunisia
| | - Leila Keskes
- Laboratory of Human Molecular Genetics, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
| | - Hassen Kamoun
- Department of Medical Genetics, Hedi Chaker Hospital, University of Sfax, Sfax, Tunisia
| | - Tarek Rebai
- Laboratory of Histology, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
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Frikha R. Assessment of the relationship between methylenetetrahydrofolate reductase polymorphism and acute lymphoblastic leukemia: Evidence from an updated meta-analysis. J Oncol Pharm Pract 2020; 26:1598-1610. [PMID: 32070201 DOI: 10.1177/1078155219900914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The methylenetetrahydrofolate reductase gene C677T polymorphism is closely related to the acute lymphoblastic leukemia. Several case-control studies have investigated this association; however, no conclusions could be drawn. A comprehensive updated meta-analysis is established to explain these contradictions and clarify the overall impact of this variant on the susceptibility to acute lymphoblastic leukemia. METHODS Electronic searches were conducted to select published studies prior to June 2018. Pooled odds ratios and stratification analysis were performed under different genetic comparison models, age, and ethnicity. RESULTS Totally, 66 case-control studies including 9619 acute lymphoblastic leukemia cases and 17,396 controls were selected. Our analyses showed that methylenetetrahydrofolate reductase C677T polymorphism was protective mainly in Asian and European countries, under all genetic models and regardless of age, but leukemogenic in mixed population. CONCLUSION Thus, C677T polymorphism may be a promising acute lymphoblastic leukemia biomarker, but they should be interpreted with caution considering other factors such as folic acid intake, gene-gene and gene-environment interactions.
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Affiliation(s)
- Rim Frikha
- Faculty of Medicine, University of Sfax, Sfax-Tunisia.,Department of Medical Genetics, Hedi Chaker University Teaching Hospital, Sfax-Tunisia
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Timms JA, Relton CL, Sharp GC, Rankin J, Strathdee G, McKay JA. Exploring a potential mechanistic role of DNA methylation in the relationship between in utero and post-natal environmental exposures and risk of childhood acute lymphoblastic leukaemia. Int J Cancer 2019; 145:2933-2943. [PMID: 30740682 PMCID: PMC6790139 DOI: 10.1002/ijc.32203] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 01/09/2019] [Accepted: 01/23/2019] [Indexed: 12/11/2022]
Abstract
The aetiology of childhood acute lymphoblastic leukaemia (ALL) is unclear. Genetic abnormalities have been identified in a number of ALL cases, although these alone are not sufficient for leukaemic transformation. Various in utero and post-natal environmental exposures have been suggested to alter risk of childhood ALL. DNA methylation patterns can be influenced by environmental exposures, and are reported to be altered in ALL, suggesting a potential mediating mechanism between environment and ALL disease risk. To investigate this, we used a 'meet in the middle' approach, investigating the overlap between exposure-associated and disease-associated methylation change. Genome-wide DNA methylation changes in response to possible ALL-risk exposures (i.e. breast feeding, infection history, day care attendance, maternal smoking, alcohol, caffeine, folic acid, iron and radiation exposure) were investigated in a sub-population of the Avon Longitudinal Study of Parents and Children (ALSPAC) cohort using an epigenome-wide association study (EWAS) approach (n = 861-927), and compared to a list of ALL disease-associated methylation changes compiled from published data. Hypergeometric probability tests suggested that the number of directionally concordant gene methylation changes observed in ALL disease and in response to the following exposures; maternal radiation exposure (p = 0.001), alcohol intake (p = 0.006); sugary caffeinated drink intake during pregnancy (p = 0.045); and infant day care attendance (p = 0.003), were not due to chance. Data presented suggests that DNA methylation may be one mediating mechanism in the multiple hit pathway needed for ALL disease manifestation.
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Affiliation(s)
- Jessica A Timms
- Institute of Health & Society, Newcastle University, Newcastle, United Kingdom
- Research Oncology, King's College London, Guy's Hospital, London
| | - Caroline L Relton
- MRC Integrative Epidemiology Unit, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Gemma C Sharp
- MRC Integrative Epidemiology Unit, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Judith Rankin
- Research Oncology, King's College London, Guy's Hospital, London
| | - Gordon Strathdee
- Northern Institute for Cancer Research, Newcastle University, United Kingdom
| | - Jill A McKay
- Institute of Health & Society, Newcastle University, Newcastle, United Kingdom
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne, United Kingdom
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Rs4846049 Polymorphism at the 3'-UTR of MTHFR Gene: Association with Susceptibility to Childhood Acute Lymphoblastic Leukemia. BIOMED RESEARCH INTERNATIONAL 2019; 2019:4631091. [PMID: 31737664 PMCID: PMC6815600 DOI: 10.1155/2019/4631091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/20/2019] [Accepted: 07/11/2019] [Indexed: 11/25/2022]
Abstract
Background Accumulating evidence has suggested the polymorphisms of methylenetetrahydrofolate reductase (MTHFR) were associated with susceptibility to childhood acute lymphoblastic leukemia (ALL). However, the known conclusions of currently known polymorphic loci (677 C > T and 1298 A > C) remain controversial. This study was to investigate new genetic biomarkers for ALL by analyzing the MTHFR polymorphisms at the 3′-untranslated region, which is a location bound by miRNAs. Methods Polymorphisms of rs4846049 (miR-555 binding) were assessed by PCR amplification and direct sequencing in 110 ALL patients and 105 healthy controls. The relative expression of MTHFR was detected by qRT-PCR. Results Overall, genotype distribution or allele carrier frequencies were not significantly different between patients with ALL and healthy controls (P > 0.05). Subgroup analysis results showed that T allele (OR = 0.134, 95% CI = 0.028–0.639; P=0.005) or genotypes with T allele (TT + GT) (OR = 0.133, 95% CI: 0.024–0.727; P=0.017) may be a protective factor for ALL susceptibility in patients with age >8 years. This conclusion was also true for the group only focusing on the precursor B-cell ALL patients. Furthermore, karyotype abnormality was more commonly observed in patients with the GG genotype (56.0%) compared to carriers of TT (0%) or GT (40.6%) genotypes, while c-myc break frequency was significantly higher in TT carriers (33%) than that of patients with GT (3.1%) or GG (0%) genotypes. PCR analysis showed patients carrying the GG genotype of rs4846049 exhibited the reduced mRNA expression of MTHFR. Conclusion MTHFR rs4846049 polymorphism may be associated with increased risk of childhood with ALL and MTHFR mRNA expression.
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Graydon JS, Claudio K, Baker S, Kocherla M, Ferreira M, Roche-Lima A, Rodríguez-Maldonado J, Duconge J, Ruaño G. Ethnogeographic prevalence and implications of the 677C>T and 1298A>C MTHFR polymorphisms in US primary care populations. Biomark Med 2019; 13:649-661. [PMID: 31157538 PMCID: PMC6630484 DOI: 10.2217/bmm-2018-0392] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 03/25/2019] [Indexed: 02/04/2023] Open
Abstract
Aim: Variants of the MTHFR gene have been associated with a wide range of diseases. Materials & methods: The present study analyzed data from clinical genotyping of MTHFR 677C>T and 1298A>C in 1405 patients in urban primary care settings. Results: Striking differences in ethnogeographic frequencies of MTHFR polymorphisms were observed. African-Americans appear to be protected from MTHFR deficiency. Hispanics and Caucasians may be at elevated risk due to increased frequencies of 677C>T and 1298A>C, respectively. Conclusion: Individuals carrying mutations for both genes were rare and doubly homozygous mutants were absent, suggesting the TTcc is extremely rare in the greater population. The results suggest multilocus MTHFR genotyping may yield deeper insight into the ethnogeographic association between MTHFR variants and disease.
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Affiliation(s)
- James S Graydon
- Laboratory of Personalized Health, Genomas, Inc., Hartford, CT 06102, USA
| | - Karla Claudio
- Pharmaceutical Sciences department, University of Puerto Rico School of Pharmacy, San Juan, PR 00936, USA
| | - Seth Baker
- Clinical Laboratory Partners, Hartford Healthcare, Hartford, CT 06102, USA
| | - Mohan Kocherla
- Laboratory of Personalized Health, Genomas, Inc., Hartford, CT 06102, USA
| | - Mark Ferreira
- Laboratory of Personalized Health, Genomas, Inc., Hartford, CT 06102, USA
| | - Abiel Roche-Lima
- Center for Collaborative Research in Health Disparities, University of Puerto Rico School of Medicine, San Juan, PR 00936, USA
| | - Jovaniel Rodríguez-Maldonado
- Center for Collaborative Research in Health Disparities, University of Puerto Rico School of Medicine, San Juan, PR 00936, USA
| | - Jorge Duconge
- Pharmaceutical Sciences department, University of Puerto Rico School of Pharmacy, San Juan, PR 00936, USA
| | - Gualberto Ruaño
- Laboratory of Personalized Health, Genomas, Inc., Hartford, CT 06102, USA
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Folate pathway genetic polymorphisms modulate methotrexate-induced toxicity in childhood acute lymphoblastic leukemia. Cancer Chemother Pharmacol 2019; 83:755-762. [PMID: 30684021 DOI: 10.1007/s00280-019-03776-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 01/13/2019] [Indexed: 01/23/2023]
Abstract
BACKGROUND Acute lymphoblastic leukemia (ALL) is one of the major malignancies affecting children in Jordan. Methotrexate (MTX) is the cornerstone of chemotherapy for ALL, and works by targeting enzymes involved in the folate pathway. We hypothesize that genetic polymorphisms of the folate pathway are associated with MTX toxicity in children with ALL. METHODS A total of 64 children with ALL were included in this study; 31 (48.4%) boys and 33 (51.6%) girls aged 2-16 years. The folate pathway genes were genotyped using polymerase chain reaction followed by sequencing and studying the association between genetic polymorphisms and MTX toxicity. RESULTS The immunophenotype was B-lineage in 55 patients (85.9%) and T-lineage in nine patients (14.1%). All genetic polymorphisms, except for dihydropyrimidine dehydrogenase polymorphisms, were associated with hematological toxicities and did not appear to precipitate any non-hematological adverse events. Patients with ALL carrying dominant alleles of methylene tetrahydrofolate (MTHFR) C677T and dihydrofolate reductase 19 bp deletion were at a higher risk of developing severe leucopenia [OR (95% CI) = 4.5 (1.2-17), p = 0.03; 5.4 (1.6-17.8); p = 0.006] while minor allele carriers of MTHFR A1298C were more likely to develop neutropenia [OR (95% CI) = 6.1 (1.3-29.5); 0.04]. Furthermore, dominant allele carriers of thymidylate synthase 1494 del6 were at a higher risk of developing neutropenia [OR (95% CI) = 6 (1.2-31.1); p = 0.04]. CONCLUSION Genetic polymorphisms of the folate pathway may modulate MTX-induced toxicity in childhood ALL.
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Tong W, Tong G, Jin D, Lv Q. MTHFR C677T and A1298C polymorphisms and lung cancer risk in a female Chinese population. Cancer Manag Res 2018; 10:4155-4161. [PMID: 30323671 PMCID: PMC6175546 DOI: 10.2147/cmar.s176263] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Objective To examine the relationship between polymorphisms in the methylenetetrahydrofolate reductase (MTHFR) gene and susceptibility to lung cancer in a female Chinese population. Method A hospital-based case-control study of 388 cases and 388 controls was conducted. Two polymorphisms in MTHFR were detected using TaqMan methods. Results The MTHFR C677T polymorphism was associated with the risk of lung cancer and lung adenocarcinoma. Carriers with the TT genotype of C677T were observed to have an increased risk of lung cancer and lung adenocarcinoma (the ORs were 1.550 and 1.588, respectively). By contrast, the A1298C polymorphism had a negative relationship with the risk of lung cancer and lung adenocarcinoma; compared with the AA genotype carriers, the CC genotype carriers had a lower risk of lung cancer and adenocarcinoma in the female Chinese population (ORs were 0.302 and 0.215, respectively). In the stratified analyses, we observed only the A1298C polymorphism in the CC genotype carriers with a statistically significant reduction in the risk of non-small-cell lung cancer, compared to the AA genotype carriers. No significant statistical association was found between the MTHFR gene polymorphisms and risk of the residual subtype of lung cancer. Conclusion This study provides evidence that the MTHFR C677T polymorphism may contribute to the development of lung cancer and lung adenocarcinoma in a female Chinese population. However, the MTHFR A1298C polymorphism may be associated with the decreasing risk of lung cancer.
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Affiliation(s)
- Weiwei Tong
- Department of Laboratory Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Guanghui Tong
- Department of Laboratory Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Dongyan Jin
- Department of Laboratory Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Qingjie Lv
- Department of Pathology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, People's Republic of China,
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